New lidocaine formulation for managing postoperative pain

A Randomized Phase 2 Trial of ST-01 (Sustained-release Lidocaine Polymer Solution for Injection) in Subjects Undergoing Pelvic Surgery

Phase 2 Interventional University of British Columbia · NCT05193227

This study is testing a new long-lasting lidocaine treatment to see if it can help people manage pain better after pelvic and perineal surgeries compared to standard care.

Quick facts

PhasePhase 2
Study typeInterventional
Enrollment120 (estimated)
Ages19 Years and up
SexAll
SponsorUniversity of British Columbia Academic / other
Locations2 sites (Vancouver, British Columbia and 1 other locations)
Trial IDNCT05193227 on ClinicalTrials.gov

What this trial studies

This study evaluates a new sustained release lidocaine formulation, ST-01, for its effectiveness in controlling postoperative pain following various pelvic and perineal surgeries. Participants will receive either the new formulation or standard care after surgery, and their pain levels and opioid consumption will be monitored over 30 days. The goal is to determine if ST-01 can provide longer-lasting pain relief compared to traditional lidocaine injections. The study will involve up to 120 subjects who will be randomized to receive either treatment.

Who should consider this trial

Good fit: Ideal candidates are adults aged 19 and older who are scheduled for surgery involving a pelvic incision.

Not a fit: Patients with chronic pain conditions or known allergies to lidocaine may not benefit from this study.

Why it matters

Potential benefit: If successful, this new formulation could significantly reduce postoperative pain and decrease reliance on opioid medications.

How similar studies have performed: While the approach of sustained release lidocaine is novel, similar studies have shown promise in improving pain management post-surgery.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Any sex, aged ≥ 19 years
* Indication to undergo an operation with a planned pelvic incision
* Able and willing to provide informed consent
* Stated willingness to comply with all study procedures and availability for the duration of the study
* If sexually active, is willing to use adequate birth control methods to prevent pregnancy over the course of the study

Exclusion Criteria:

* History of chronic pain conditions associated with the use of opioids or steroids
* Known allergic reactions to any components of the investigational product
* Active infection involving the surgical site
* Any contraindication to local anesthesia with lidocaine (e.g., known hypersensitivity to anesthetics of the amide type, known hypokalemia, complete heart block, anticoagulants (ASA permitted) antiarrhythmic medication)
* Use of prohibited medications (quinidine, procainamide, disopyramide, lidocaine, mexiletine, flecainide, propafenone, amiodarone, dronedarone, ibutilide, dofetilide, sotalol, vernakalant)
* Has participated in another clinical trial within 3 months prior to the Screening Visit or is planning to participate in another clinical trial during this trial period
* Has any other surgical or medical condition that, in the judgment of the clinical Investigator might warrant exclusion or be contraindicated for safety reason

Where this trial is running

Vancouver, British Columbia and 1 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Postoperative PainPostsurgical Painpelvic surgeryscrotal surgeryinguinal incisioncircumcisionhemorrhoidectomyfistulotomy
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.